How many languages can you speak?

Language is one of the most fascinating human attributes. Humans use over 6500 languages across the world today. Your brain seems to be wired to learn language from birth, so what makes some people better at learning languages than others? Research into language ability suggests that bilingual people have better mental control, as they are always choosing which language to speak. Other research suggests that being fluent in a number of languages might help your brain to age better.